This easy to use hand tool will make the installation of your Key-Locking Screw Thread Inserts a breeze. Ensures that the insert's locking keys are perfectly straight and fully recessed. Manufactured out of carbon steel it will stand the test of time and power through your toughest jobs. Proudly made in the USA.Looking for the Inserts or a Complete Thread Repair Kit?For a comprehensive list of our available kits, inserts, and tools - please visit ourKey-Locking Thread Insertsummary page.